In terms of whether or not the ubiquity of cookie banners is malicious compliance or if it was an inevitable consequence of GDPR, it doesnt matter if trackers are good or necessary. GDPR doesn't ban them. So having them and getting consent is just a normal consequence.

We can say, "Wouldn't it have been nice if the bad UX of all these cookies organically led to the death of trackers," but it didn't. And now proponents of GDPR are blaming companies for following GDPR. This comes from confusing the actual law with a desired side effect that didn't materialize.

No, those companies do not follow GDPR. They are testing how far they can go without triggering mass complaints etc.

See https://noyb.eu/en/where-did-all-reject-buttons-come